The lanthanoid that does NOT show +4 oxidation state is :
Show Hint
- Tb
- Dy
- Ce
- Eu
The Correct Option is D
Solution and Explanation
Europium (4f76s2) already reaches the stable half-filled 4f7 configuration in Eu2+, so it shows +2 and +3 but not +4.
Hence Eu does not show +4.
Answer: (4) Eu
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